students = {
    "name" : "张三",
    "age" : 20
}

person = dict(name="露文",age=6)

score = {"math": 88}

print(students["name"])
print(students.get("age"))
print(students.get("height","未知"))

for key in students:
    print(students[key])

print(students.keys())
print(students.values())

a_list = [x for x in students.values()]
print(a_list)

del students['age']
print(students)

print("\n有name吗？")
if 'name' in students:
    print("有的，兄弟，有的")
else:
    print('完啦，BBQ啦')